Compsodrillia haliplexa is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.

It shows eight or nine prominent axial ribs with equal or wider interspaces and faint incremental lines.

The anal fasciole is wide, constricted, a single strong cord and fine spiral threads between it and the suture.

In front of the fasciole are about six strong cords slightly swollen as they override the ribs, with much wider interspaces occupied by fine spiral threads, the cord at the periphery stronger than the rest.

The outer lip is sharp, arcuate and undulate by the ends of the spiral cords.